66400352 has 12 divisors (see below), whose sum is σ = 130725756. Its totient is φ = 33200160.

The previous prime is 66400349. The next prime is 66400403. The reversal of 66400352 is 25300466.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1037474 + ... + 1037537.

It is an arithmetic number, because the mean of its divisors is an integer number (10893813).

Almost surely, 2^66400352 is an apocalyptic number.

It is an amenable number.

66400352 is a deficient number, since it is larger than the sum of its proper divisors (64325404).

66400352 is a wasteful number, since it uses less digits than its factorization.

66400352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075021 (or 2075013 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 66400352 is about 8148.6411137072. The cubic root of 66400352 is about 404.9394859543.

The spelling of 66400352 in words is "sixty-six million, four hundred thousand, three hundred fifty-two".